Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

iOS Build a Simple iPhone App with Swift Getting Started with iOS Development Swift Recap Part 1

Virgil Alaniz
Virgil Alaniz
3,716 Points

"Implementation of Description" not being accepted as correct, why not?

struct Tag { let name: String }

struct Post { let title: String let author: String let tag: Tag

func description() -> String { let descriptionString = "(title) by (author). Filed under (tag.name)." return descriptionString } }

let firstPost = Post(title:"iOSDevelopment", author:"Apple",tag:Tag(name:"Swift"))

let postDescription = firstPost.description()

// THERE IS NOTHING TO CHECK IN THE OUTPUT, I'VE NO FEEDBACK. // It mentions to use string interpolation. I am doing so. I also tried the following: // return "(title) by (author). Filed under (tag.name)." //this fails as well.

structs.swift
struct Tag {
  let name: String
}

struct Post {
  let title: String
  let author: String
  let tag: Tag

  func description() -> String {
    let descriptionString = "\(title) by \(author). Filed under \(tag.name)."
    return descriptionString
  }
}

let firstPost = Post(title:"iOSDevelopment", author:"Apple",tag:Tag(name:"Swift"))

let postDescription = firstPost.description()

2 Answers

First, there's no dot at the end of the sentence you are supposed to return.

Second, you have to return that sentence, not a constant/variable. So, not this: let something = "AAAAA" return something But this: return "AAAAA"

Virgil Alaniz
Virgil Alaniz
3,716 Points

Thanks for answering. I figured it out soon after posting but don't know how to retract a post.

The extra "." was the problem. Returning a constant with the string is OK, although I initially started with just returning a string, I changed it when I couldn't figure out what the problem was.